// ********************************************************************
// * License and Disclaimer                                           *
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// * the Geant4 Collaboration.  It is provided  under  the terms  and *
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// * technical work of the GEANT4 collaboration.                      *
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//
// @Author Chad Lantz
#include "EventAction.hh"

#include "G4VProcess.hh"

#include "G4ParticleDefinition.hh"
#include "G4ParticleTypes.hh"
#include "G4SDManager.hh"
#include "G4Event.hh"
#include "G4Track.hh"
#include "G4ios.hh"

#include "PMTHit.hh"
#include "lgAnalysis.hh"

/*
 *
 */
EventAction::EventAction()
  : G4UserEventAction(),
    hitsCollID(0){
  fPtrVec.push_back(&x);
  fPtrVec.push_back(&z);
  fPtrVec.push_back(&xHit);
  fPtrVec.push_back(&zHit);
  fPtrVec.push_back(&time);
  fPtrVec.push_back(&theta);
  fPtrVec.push_back(&energy);

}

/*
 *
 */
EventAction::~EventAction(){

}

/*
 *
 */
void EventAction::BeginOfEventAction(const G4Event* event){
  fEventNo = event->GetEventID();
  if(fEventNo%100000 == 0) G4cout << "Begin Event " << fEventNo << G4endl;
  hitsCollID = 0;

  for(uint i = 0; i < fPtrVec.size(); i++){
    fPtrVec.at(i)->clear();
  }
}

/*
 *
 */
void EventAction::EndOfEventAction(const G4Event* event){
  hitsCollID = G4SDManager::GetSDMpointer()->GetCollectionID("MyPMT");
  G4HCofThisEvent* HCE = event->GetHCofThisEvent();
  if(HCE){
    HitsCollection* HC = (HitsCollection*)(HCE->GetHC(hitsCollID));
    if( HC->entries() ){
      for(int i = 0; i < HC->entries(); i++ ){
        PMTHit* aHit = (*HC)[i];
        // fill vectors //
        x.push_back     ( aHit->getPos().x() );
        z.push_back     ( aHit->getPos().z() );
        xHit.push_back  ( aHit->getHit().x() );
        zHit.push_back  ( aHit->getHit().z() );
        time.push_back  ( aHit->getTime()    );
        energy.push_back( aHit->getEnergy()  );
        G4double pTheta = atan(sqrt(pow(aHit->getMomentum().x(),2) + pow(aHit->getMomentum().z(),2) )/fabs(aHit->getMomentum().y() ));
        theta.push_back( pTheta );
      }
      // fill ntuple  //
      G4AnalysisManager* analysisManager = G4AnalysisManager::Instance();
      analysisManager->AddNtupleRow();
    }
  }
}